Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 101. (Budapest 2009)

Makranczy, Gy.: The genus Thinodromus Kraatz, 1857 in West-Central Africa (Coleoptera, Staphylinidae: Oxytelinae)

The genus Thinodromus in West-Central Africa ( Coleoptera) 45 Thinodromus makokouensis sp. n. (Figs 22-24, 33-34, 37) Type material - Holotype (male): "Gabon, [Ogooue-Ivindo,] Makokou (39) [00°34' N, 12°52' E], 26.1.1963, [leg.] H. Coiffait, Mission Biologique] au Gabon, P.P. Grasse Directeur" (coll. COIFFAIT, MNHN). Description - Measurements (in mm, n = 1 ): HW = 0.68; TW = 0.58; PW = 0.76; SW = 0.96; AW = 1.06; HL = 0.40; EL = 0.27; TL = 0.00; PL = 0.58; SL = 0.92; SC = 0.86; BL = 3.84. FL = 1.96 mm. - Colour. Body surface moderately shining, very dark reddish-brown, almost black, supraantennal processes lighter, yellowish. Legs medium brown, tibiae (except for apices) slightly darker. - Shape and sculpture. Head rather transverse, large eyes occupy sides, no developed temples. Antennái segments ovoid, antennomeres 4-5 1.26-1.35x longer than broad, antennomeres 9-10 l.OO-l.lOx longer than broad. Pronotal sides rounded and convex everywhere, no concavity. Reflexed lateral margin very narrow, posteriorly hardly noticeable. Horseshoe-shaped pronotal impression moderately deep, similar to T. odzalensis. Elytra together only very slightly (1.22x) broader than long, dilating towards apex, each elytron has a shallow and moderately large impressed area in the anterior half of disc. - Punctation and microsculpture. Head punctation very fine, but punctures more equal in their sizes; close, interspace smaller than diameter. Pronotal punctation very fine; interspace nearly equal to puncture diameter; variously sized punctures. Elytral punctation medium fine, moderately deep, interspaces smaller than puncture sizes. Abdominal punctation extremely fine, variously sized punctures, interspaces large, their ratio to puncture sizes does not differ anteriorly and posteriorly. No apparent microsculpture anywhere on the body except posterior pronotal corners, where punctation diminishes into coriaceous ground sculpture. - Pubescence. Setation medium dense and of the two-sized type, like in T, odzalensis, composed of very thin small hairs, more or less depressed and long, stronger, semierect setae. Mixture of the two types most apparent on the abdominal terga and on the elytra. Pronotal base mostly with the finer type hairs, just like the head, while pronotal sides mostly have the long ones. - Primary and secondary sexual features. Male: in the inner sac ot the aedeagus (Figs 22-24) AC reverse V-shaped with strongly developed lamellar sides, MA+BM with a conspicuous fused formation. Sternite VIII (Fig. 33) with the middle of posterior edge slightly pulled out bearing a V-shaped medial incision, tergite X (Fig. 34); female: unknown. Comparative notes - This species is similar to T. odzalensis in many aspects, even the aedeagal structures show a great similarity. Without doubt they are close relatives. The characteristic two-sized type setation differentiates them from other similar congeners. The pronotal margin is almost unnoticeable in this taxon and this is the largest amongst the known species in the region. Another unique feature is that the middle of posterior edge on male sternite VIII bears an unusually sharp V-shaped incision. Etymology - The species is named after the type locality. Annls hist.-nat. Mus. natn. hung. 101, 2009